Mechanical Properties of MFC Foams
Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Microfibrillated cellulose (MFC) foams have been prepared in order to see if it is a possibility to replace part of petroleum-based foams. MFC is a produced by delaminating the wood fibre cell wall into individual nano-fibrils. The MFC foams were produced by using a freeze drying technique. Different kinds of MFC have been studied for there mechanical properties. MFC foams with different densities and derived from pulp with different pre-treatments were tested in term of compression strength and moisture sorption. The results show that the type of MFC called generation 2 has better energy absorption and higher elastic modulus. Generation 1-MFC has a more homogenous nano-cellulose foam structure and lower moisture sorption. Incorporations of clay into the foams and by heat treating the foams did not affect the mechanical properties. The freezing process turned out to be of less importance than expected in terms of mechanical properties but do have a large impact on the structure of the cellulose foam network as evaluated by nitrogen adsorption.
Place, publisher, year, edition, pages
2011. , 51 p.
Trita-AVE, ISSN 1651-7660 ; 2011:30
Materials Engineering Composite Science and Engineering
IdentifiersURN: urn:nbn:se:kth:diva-74693OAI: oai:DiVA.org:kth-74693DiVA: diva2:489857
Master of Science in Engineering - Materials Design and Engineering